---
title: "Changes to Earliest free start time on a channel"
method: GET
path: "/projects/{project_id}/planned_measurements/next_available"
---

# Changes to Earliest free start time on a channel

`GET /projects/{project_id}/planned_measurements/next_available`

> Every recorded change to this operation, newest first.

## Timeline

Changed in 1 of 25 revisions.

- **2026-09-30** `ea3d377fec1a`: 2 breaking

## Changes

- **2026-09-30** `ea3d377fec1a`: 2 breaking
  - for the `path` request parameter `project_id`, the format changed from no format to `uuid`
  - for the `query` request parameter `channel_id`, the format changed from no format to `uuid`

---

[Operation](https://skmtc.dev/ionworks/apis/ionworks-api/docs/projects/:project_id/planned_measurements/next_available/get.md) - [API](https://skmtc.dev/ionworks/apis/ionworks-api.md) - [Page](https://skmtc.dev/ionworks/apis/ionworks-api/changes/projects/:project_id/planned_measurements/next_available/get)